﻿<!doctype html>
<html lang="en">
<head>
	<meta charset="UTF-8">
	<title>Document</title>
	<style type="text/css">
		#father #son{color:blue;}
		#father p.c2{color:black;}
		div.c1 p.c2{color:red;}
		#father{color:green !important;}
	</style>
</head>
<body>
	<div id="father" class="c1">
		<p id="son" class="c2">试问这行字体是什么颜色的？</p>
	</div>
</body>
</html>
